Improvement in the manufacture of nozzles and screw-caps for oil-cans



UNITED STATES PATENT OFFICE.

E. T. OOVELL, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN THE MANUFACTURE 0F NOZZLES AND SCREW-CAPS FR OIL-CANS, &c.

Specification forming part of Letters Patent No. 96,890, dated November 16, 1869.

To all whom it may concern.-

Be it known that I, EDWARD T. GovELL, ot' the city of Brooklyn, in the county of Kings andState of New York, have invented a new and useful Improvement in Metallic Screw- Oaps and Nozzles for Oil-(3ans and other Vessels; and I do hereby declare the following to be a full and exact description thereof, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1 is a view in perspective, and Fig. 2 a central section, of a closed nozzle spun up of soft metal and embracing my improvement; Fig. 3, a View in perspective, and Fig. 4 a central section, of a cap made according to my invention to t on said nozzle, Fig. l; and Fig. 5, `a view in perspective of a thin metal threaded ring or ferrule, to be combined with a nozzle or cap, as illustrated in the remaining figures.

The nature of my invention consists in securing'upon a nozzle and within a cap to fit thereon threaded rings of metal, whereby the cap and nozzle may be screwed together closely and securely.

Heretofore nozzles and caps for oil-cans and other vesssls in which the cap is formed to screw upon the nozzle have been fitted to screw together by means of threads formed immediately out of the metal proper of the cap or nozzle by being stamped or spun up therefrom. Hence, where a very close joint has been required the nozzles and caps have been formed wholly of brass or other hard metal of such sufticient thickness as to admit of a screwthread being cut thereon or therein but such caps and nozzles are necessarily expensive. In the ordinary cheap tin or soft-metal caps, in which the threads are spun or stamped out of the body of the metal, the joints are necessa` rily loose, because of the difficulty of securing accuracy in the formation of the screw-threads by such processes, and hence afford but little security against leakage and loss.

By my invention I am enabled to make a very cheap soft or thin metal threaded nozzle and screw-cap, which shall close as accurately and securely as will those formed out of solid hard metal.

My improved nozzle may be manufactured in the usual manner out of zinc', tin, or other cheap thin or soft metal, either open or closed at their outer end. Upon the nozzle, when partially formed, I slip a thin close-fitting ring, A, of metal, threaded exteriorly, as required, and then secure it in place thereon by spinning up the metal of the nozzle, if it be soft, so as to form a close neck or rim,ct a', above and below it, as illustrated in Figs. l and 2, else by soldering the same, as shown in Figs.3 and 4. In the same manner I secure a counterpart thin interiorly-threaded ring of metal within the cap, made to [it the nozzle, as shown in Figs. 3 and 4, so that the two shall readily, yet closely and accurately, it and screw together. The rings A may be cut of the proper width from a threaded tube ofthe proper metal, as required.

By the use of the separate threaded ring A as a substitute for a thread cut, cast, or spun immediately upon the nozzle I prevent the leakage resulting oftentimes from a cutting through of the metal by the tools used in forming the threads or from defects in the casting thereof; for if such injuries or defects occur in the manufacture of the threaded rings or ferrules they are covered by their combination with the cap or nozzle to which they are secured, as herein set forth.

Having thus fully described my invention, I do not claim a threaded nozzle and screwcap; but

I claim as new and desire to secure by Letters Patent- A separate threaded ring or ferrule, A, in combination with a nozzle or cap of thin or soft metal, substantially in the manner and for the purpose herein set forth.

E. T. GOVELL.

Witnesses:

THEO. F. JACKSON, 'L H. J. DOLMAGE. 

